... -cysteine; Acetylcysteine, Cysteine, Cysteine Hydrochloride, Cystine, L-Cysteine, L-Cysteine HCl, NAC, N-Acetil Cisteína, ... is helpful against viruses.2. N-Acetyl-L-Cysteine has been used as a liver protectant ... pulmonary and bronchial mucus.3. N-Acetyl-L-Cysteine can boost glutathione levels in cells.4 ... (which can be produced from L-cysteine) and L-methionine from which L-cysteine can be produced in ...